gen_i2c_callouts.pl: install this script

Change-Id: Idaa904dd059e65c6f28ff48696f20a31eb711882
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
diff --git a/Build.PL b/Build.PL
index 53b7e81..49416c0 100644
--- a/Build.PL
+++ b/Build.PL
@@ -6,6 +6,7 @@
     license => 'perl',
     script_files => ['gen_devtree.pl',
                      'gen_fru_properties.pl',
+                     'gen_i2c_callouts.pl',
                      'gen_ipmi_fru.pl',
                      'gen_led_groups.pl',
                      'gen_openpower_fru.pl',